Book of carbon papers



Feb. 17, 1942. J. B. BEACH v BOOK OF CARBON PAPERS 2 SheetS- -Sheet 1Filed Oct. 28, 1941 4 0 fl w Wm M i 2 as m: 0 FL Feb. 17, 1-942. J. B.BEACH BOOK OF CARBON PAPERS Filed 001:

. 28, 1941 2 Sheets-Sheet .2

vvv qlrflliiillllillll. rlilllllliillll Patented Feb. 17, 1942 UNITEDSTATES PATENT OFFICE 2,273,005 noon F cannon PAPERS John B. Beach,Washington, D. 0. Application October 28, 1941, Serial No. 416,901

11 Claims. (Cl. 282-11) This invention relates to carbon paper, and moreparticularly to a book of carbon papers from which a single sheet or abooklet containing a desired number of sheets can be detached easily foruse as needed. It also relates to a book of alternate sheets of carbonpaper and writing paper from which a booklet, containing a desirednumber of carbon sheets and writing sheets interleaved with one another,can be detached easily for use as needed, and, after use, the writingsheets can be detached from the booklet and withdrawn from between thecarbon sheets with ease. f

This application is a continuation in part of my copendlng application;Serial No. 335,175, filed May 14, 1940, for Book of carbon papers andcontainer therefor.

It has heretofore been customary for carbon paper that is used forordinary purposes to be supplied in loose-leaf form. When using suchpaper it is necessary to handle each sheet separately, and, whencomposing a pack of such carer at one end to form a booklet are easierto interleave with sheets of stationery, and to keep inneat conditionafter use, than loose-leaf sheets.

Another object of the invention is to provide a pack of alternate sheetsof carbon paper and writing paper in which each sheet is bound to thenext sheet in such a way as to form a book, from which a desired numberof carbon sheets and writing sheets. interleaved with one another andbound to each other as a booklet, may bedetached for use as needed, and,after use, the writing sheets may be detached easily from the bookletand withdrawn from between the carbon sheets. This form of the device ispreferably used with the so-called one-run" carbon sheets that areintended for use once only and are then thrown away.

When one-run carbon paper is used in thisform of my invention, one ofthe objects of the invention is to make it unnecessary for the opbonpaper and stationery, great care is required to place each sheet ofcarbon paper and each sheet of stationery in proper alignment. Thiscannot be done easily, because carbon paper is generally not rigid.

In order to preserve used sheets of carbon paper in good condition forfuture use they should be placed one upon another in alignment beforethey are stored. It is not easy, however, to align them and keep themthat way when they are handled. Consequently, they often get intoadisorderly and unwieldy heap that results in their becoming wrinkledand dog-cared, and they cease to be useful sooner than they would ifthey were properly stored in a neat and orderly pack. Moreover, verythin sheets of carbon paper, which are preferred to thicker sheets whenmany copies are to be made, are easily blown about with the slightestmovement of the air, making it very difilcult. and annoying tointerleave them with sheets of paper, or to arrange them neatly forsafekeeping after use.

The principal object of this invention is to provide means whereby manyof the above-mentioned dimculties and disadvantages may be overof sheetsof carbon paper thatare bound togethto ith e a e primary a d ot erincidental erator to interleave sheets of writing paper with carbonsheets; the writing sheets that are intended to receive the carbonimpressions are already interleaved with the carbon sheets, and all thatthe operator needs to do is to place a sheet of writing paper, which isintended to receiveother object 'of this form of my invention is to makeit unnecessary for the operator to exercise care in handling a pack ofalternate sheets of carbon paper and writing paper to see that they donot slip out of register with one another, because the writing sheetsand carbon sheets are bound together in register and cannot slip apartaccidentally.

Another object of the invention is to provide a book of carbon papers ofthe type herein characterized which may also have the edges of theleaves opposite the bound edges staggered, or provided with notches,stiffened tabs, or tabs in the nature of index tabs so as to facilitatethe handling of each leaf of the book, or of a booklet that has beendetached from it.

Still another object of the invention is to provide a book of carbonpapers and a bookcontaining alternate sheets of writing paper and carbonpaper, of the type herein characterized, which may also have one or bothcorners of the edges opposite the bound edge of the carbon sheetsnotched, to facilitate the removal of writing sheets that areinterleaved with the 'carbon sheets.

. out;

objects in view, as will more fullyappear in the I specifications, theinvention consists of the features of construction, the parts andcombinations thereof, or their equivalents, as hereinafter described andset forth in the claims.

Referring to the accompanying drawings wherein is shown the preferred,but obviously not necessarily the only form of the embodiment of theinvention;

Fig. 1 is a plan view of a book of carbon papers;

Fig. 2 is an enlarged sectional view taken in the the direction of thearrows on the line V-V of Fig. 1, showing a book of carbon papers thathas staggered v edges;

Fig. 6 is a plan view of a book of carbon papers that has uncarbonizedmarginal ends and two corners notched;

Fig. 7 is a perspective view of a fragment of a book of carbon papersthat has indexed edges; Fig. 8 is a fragmentary sectional view taken inthe direction of the arrows on the line VIII- -;VIII of Fig. I;

Fig. 9 is a perspective view of a fragment of a book of carbon papersthat has notched edges;

Fig. 10 shows a sheet of carbon paper, weakexceeds the stressesresulting from normal handling of the sheets but that is exceeded by thestress resulting when any two contiguous sheets are grasped at theiredges adjacent the bond and pulled away from each other by a peelingorstripping action. In other words, the bond is sufliciently strong toprevent accidental separation of the sheets during ordinary or normalhandling of them, but at the sametime it has a severability that permitsrelatively easy separation of the sheets in the manner mentioned.

Because the bond will withstandnormal handling conditions and yet permitready separation of any two contiguous sheets when they are peeled orstripped apart, a group of sheets of carbon paper of any desired numbermay be -detached as a unit or booklet from the main book, and the sheetsin the booklet will remain attached to each other, and the sheets in themain book will remain attached to each other,.after the booklet has beensevered from the book.

The bond may be formed in any manner that v meets the above-mentionedrequirements. Two

means of constructing the bond are shown as examples. One is illustratedin Figs. 1, 2, 3, and 6, and the other in Fig. 11.

The bond 3, shown in Figs. 1, 2, 3, and 6, comprises an adhesive thatmeets the above-mentioned requirements of the bond. Suitable adenedalong a line parallel with and a short distance from one edge by meansof perforations, -for use when the bond is constructed as shown in crosssection in Fig. 11.

Fig. 11 is an enlarged sectional view similar to that shown in Fig, 2,showing an alternate construction of the bond.

Fig. 12 is a diagrammatic sectional view show- I ing the arrangement ofa booklet of carbon paper interleaved with sheets of writing paper andlocated around the platen of a typewriter;

Fig. 13 is a plan view of a modified form of the invention showing abook comprising alternate sheets of carbon paper and writing paper;

Fig. 14 is an enlarged sectional view taken in the direction of thearrows on the line XIV- HV of Fig. 13, showing one construction of thebond;

Fig. 15 is an enlarged sectional view similar to that shown in Fig. 14,showing another construction of the bond; Q Fig. 16 is an enlargedsectional view similar that shown in Fig. 14, showing still anotherconstruction of the bond;

Fig. 17 is an enlarged sectional view similar to that shown in Fig. 14,showing yet another construction of the bond;

Fig. 18 is a perspective view'of thedevice shown in Fig. '13,illustrating the manner in which the writing sheets may be detached,fromthe booklet and withdrawn from between the carbon sheets 3 Referringmore specifically to the drawings, in

which like numerals refer to like parts through- 'The numeral. Iindicates a book of carbon papers comprising aplurality of sheets ofcarbon hesives comprising materials of many different kinds may be usedto form this type of bond, when prepared in conformity with a knowledgeof the adhesive art to meet the above-mentioned requirements.Preferably, any adhesive used should be flexible to a degree andnormally untacky. Generally, it may be said that the adhesives usedshould not possess such great adhesive strength that they have atendency to resist severance to the extent of damaging the sheets whilethey are being severed from one another. On the other hand, theadhesives used should not be so brittle, or possess such slight adhesivestrength that they have such a low resistance to severance that theywill not withstand severance when subjected to the stresses result ingfrom normal handling of the sheets. While I.do not wish to limitthescope of the invention to/ any particular kind of bond or adhesive solong as it meets the above-mentioned requirements, I at present preferto make the bond 3 of a wax-like substance, such as a natural or syn,thetic wax, because it is inexpensive and can, most instances, be usedeven where the DOItl-Oll If desired, the adhesion between contiguoussheets may be increased if the'portion of the sheets that is to receivethe adhesive is provided with apertures at spaced intervals soas topermit the adhesive to extend through the apertures to the nextcontiguous sheet. Such apertures would be in addition to the apertures 4that'may be provided for a purpose explained more fully below, so thatthey may, 'or may not, as desired. be

arranged to offset one another in alternate sheets when the book iscomposed.

If a desired bonding material does not have an ailinity for thematerials forming the carbonized surfac of the carbon paper used, theportion of the carbon sheets that is to be bonded may be devoid ofcarbon. Thus, permitting, a wider range of adhesives to be used to formthe bond.

e A suitable bond may also be made as illustrated in cross-section inFig. 11. There the carbon sheets 2' are weakened by perforations, orother suitabl means, along a line parallel with, and a shortdistancefrom, the end of the sheet, in the manner shown at I in Fig. 10.The marginal end ll of the carbon sheets that is set off by theperforations is then folded along the perforations and firmly fastened,by means of an adhesive l2 possessing substantial adhesive strength, orby other suitable means, to the back of the adjacent sheet of carbonpaper, so that the perforations ID in one sheet are adjacent those ofthe next sheet, as shown in cross section in Fig. 11. Thus, a bond isformed that resists severance during conditions of normal handling, butmay be readily severed between any two contiguous sheets by stripping ortearing along the perforations.

- If it is desired to use the book of carbon papers in connection withone form of the device shown and claimed in my copending application,Serial No. 335,175, filed May 14, 1940, referred to above, apertures maybe provided at the edge of the book adjacent the bond, as indicated at4. When it is desired to use some of the carbon paper from the book I,the number of sheets of carbon paper that are desired for the manifoldwriting are counted off, and, as a unit, they are severed from the bookby peeling them off somewhat in the manner illustrated in Fig. 3. Thesheets that are thus detached from the book remain attached to eachother, by means of the bond, in the form of a booklet of carbon papersI3, wherein the sheets remain in register with each other and may behandled easily as a unit. The booklet may be .placed on a flat surface,and sheets of writing paper interleaved with the sheets of carbon paperin the usual manner. This task is facilitated by the fact that thecarbon sheets, being bound together adjacent one edge, remain inregister with one another without the need for careful placement by theoperator, and are not easily set in unruly motion by slight movements ofthe air. The task of interleaving sheets of writing paper with thesheets of carbon paper in the booklet can be made even less difficult ifthe booklet is used with the device disclosed and claimed in mycopending application, Serial No. 335,175, filed May 14, 1940, referredto above.

The assembled-manifold pack may be inserted in a typewriter in the usualmanner, but the edge that has the free edges of the booklet of carbonpapers should be inserted first, so that, as shown diagrammatically inFig. 12, when the packet M has been drawn around the platen of atypewriter l the free edges will be at the top, as shown at It, allowingeasy access to each sheet of stationery for the purpose of makingerasures or corrections.

After the manifold writing has been finished, the sheets of stationerymay be removed easily from between the sheets of carbon paper by takinghold of the bound end of the booklet of carbon paper with one hand andshaking it so that the sheets of stationery will be released and fallinto the other hand. A more desirable means of removing the sheets,however, may be supplied if one or more of the corners of the free edgesof the book is notched as indicated at 5 and 5"in Figs. 4 and 6,respectively. In that the book I, in Fig. 6. In this form, the comers ofthe unbound margin may be notched, as shown at 5', to permit easywithdrawal of the sheets of stationery from betweenthe leaves of carbonpaperyand to permit a booklet of carbon papers of this design to be usedon the device shown in my copending application, Serial No. 335,175,filed May '14, 1940, referred to above, in the manner therein described.

If desired, in order to make it easy for the operator to take hold ofone leaf of a book of carbon papers at a time many means might-beprovided, and a few are illustrated in Figs. 5, 6, 7, 8, and 9 Themargins 1, in Fig. 6, that are uncarbonized may be stiffened. The freeedges 'of the book may be staggered as shown at 6 in Fig. 5, or they maybe cut so as to offset one another in the manner of index tabs, as shownat I in Figs. 7 and 8; they may be notched in such a way that thenotches of one sheet areadjacent to an unnotched portion of the adjacentsheets when the book isbound, in the manrrer shown at I! in Fig. 9. Manyother ways could obviously be suggested, but it is thought that theseare sufficient for the purposes of illustration.

In the modified form of the invention, illustrated in Figs. 13 through18, the numeral l9 indicates a pack or book of alternate sheets ofcarbon paper 2 and writing paper 20, arranged in register with eachother. All of the carbonized surfaces 2| of the carbon sheets face thesame direction, and, preferably, the first sheet at the top of the packis a carbon sheet, with its carbonized surface facing down, in contactwith the adjacent writing sheet, and the last sheet at the bottom of thepack is a writingsheet, so that for each writing sheetin the pack thereis a corresponding carbon sheet with its carbonized surface adjacent thewriting sheet. The sheets are held together adjacent one edge by asuitable bond, which may take a variety of forms as hereinafterexplained in more detail. Preferably,

each sheet of carbon paper is notched at one of its free corners, asshown at 5, exposing a corner of the-sheets of writing paper.

The bond has a resistance to severance that exceeds the stressesresulting from normal han dling of the sheets but that is exceeded bythe stress resulting between any two contiguous sheets when they aregrasped at their edges adjacent the bond and pulled away from each otherby a peeling or stripping action. The resistance of the bond toseverance is also exceeded as between any writing sheet and the adjacentcar bon sheets, but is not exceeded as between'said adjacent 'carbonsheets, when the writing sheet is grasped at its unbound end andpulled-orjerked away from the bond.

the bond is sufficiently-strong to prevent acci- In other words,

mentioned.

Because the bond will withstand normal handling conditions and yetpermit ready separation of any two contiguous sheets when they arepeeled or stripped apart, a group of alternate sheets of carbon paperand writing paper of any desired number may be detached as a unit orbooklet from the main pack or book, and the sheets in the booklet willremain attached to each other, and the sheets in the main book willremain attached to each other, after the booklet has been severed fromthe book.

Since the bond will withstand normal handling conditions and yet permitthe writing sheets to be separated from the carbon sheets by graspingthe writing sheets at their unbound end and pulling or jerking them awayfrom the bond, a booklet that has been severed from the book that isheld to the carbon sheets by the bond is relatively small compared withthe portion of the edge of the carbon sheets that is held to the nextcarbon sheet by the bond, so that the writing sheetsare less securelyheld to the carbon sheets than are the carbon sheets held to each may beused for duplicate writing, and, while that is being done, the carbonsheets and the writing sheets will remain attached to each other and 15,and 18, and the other type in Figs. 16 and 17.

'The bond 22, shown in Figs. 13, 14, and 15, comprises an adhesive thatmeets the abovementioned requirements of the bond. Suitable adhesivescomprising materials of many different kinds may be used toform thistype of bond, when prepared in conformity with a knowledge of theadhesive art to meet the above-mentioned requirements. Generally, thesame adhesives that are suitable to form the bond 3, in the form of theinvention described above and illustrated in Figs. 1, 2, 3, and 6, arealso suitable for the bond 22. While I do not wish to limit the scope ofthe invention to any particular kind of bond or adhesive so long as itmeets the above-mentioned requirements, I at present prefer to make thebond 22 of the same materials as described above for making the bond 3.

When the bond is formed as illustrated in Figsf 'ing sheets by the bond22, and the edge of each writing sheet that is adjacent the extendededges of the carbon sheets is held by the bond 22'to the carbonsheetthat has its carbonized surface 2| in contact with the writingsheet. The writing sheets could, if desired, be bonded also to thecarbon sheet that has its back or uncarbonized I surface in contact withthe writing sheet, but; it

is not preferable todo so, because, otherwise, when they are bonded onlyto the adjacent sheet of carbon paper thath'as its carbonized surface incontact with the writing sheet, it is impossible for the pack or book tobe-severed inadvertently in such a way that a writing sheet will bebonded.

to a carbon sheet that has its uncarbonized surface next to the writingsheet. I

The portion of the edge of thefwritingsheets ill other. Because of this,the bond has less resistance to severance between the writing sheets andthe carbon sheets than between the portions of the carbon sheets thatare bonded together.

In some cases, if the bond is formed of certain adhesives, it may beadvisable, in order to prevent the bond from penetrating into the paperand rendering it transparent, to provide the edge of the sheets ofwriting paper that is secured to the sheets of carbon paper by the bondwith a suitable hardening or impregnating medium where it comes incontact with the bond, especially when the bond is composed of certainwaxes, such as parafiin wax, or wax-like derivatives of the fatty acidsor their esters. As such an impregnating, saturating or protective agenta suitable paste or glue, dextrine and the like, may be used.

As mentioned above, if a desired bonding material does not have anaflinity for the materials forming the carbonized surface of the carbonpaper used, the portion of the carbon sheets that is to be bonded may bedevoid of carbon. Thus, permitting a wider range ofadhesives to be usedto form the bond.

When the bond is made of certain materials having little body, thethickness ofthe writing sheets cause the book to bulge or be thickerthroughout the length of the writing sheets than it is at the portion ofthe bond where the carbon sheets extend beyond the writing sheets. Forthis reason, it may be desirable in some-instances to provide aseparator 23 of approximately the same thickness as the writing sheetsto fill the space-between the carbon sheets where. they extend beyondthe writing sheets and are bonded together. The separator may be formedin any suitable manner. In Fig. 15 it is illustrated at 23 as beingformed from the folded, extended end of the carbon sheet, but it'"'inay,of course, be formed by a strip ,or ribbon of paper having approximatelythe same thickness as the sheets of writing paper used.

A suitable bond may also be made as illustrated in cross section in Fig.16. There the carbon sheets 2' are longer than the writing sheets 20 andare weakened by perforations, or other suitable means, along a lineparallel with, and

a short distance from. the end of the sheet, in v the manner shown at Inin Figs. 10, 16, and 17. The writing sheets 20' are similarly weakenedby perforations, or other suitable means, along a line parallel with,and a short distance from, the end of the sheets in the manner shown at24. The marginal end II of the carbon sheets that is set off by theperforations I0 is folded over along the perforations and firmly,fastened, by means of an adhesive 25v possessing substantial adhesivestrength, or by other suitable means, to the marginal end 26 of thewriting sheet that is set off by the perforations 24. The other side ofthe marginal end 26 of,,the writing sheet is then firmly fastened to thenext carbon sheet adjacent and below the perforations ll) of that carbonsheet. If desired, as illustrated in cross section in Fig. 17, themarginal end 26 of the writing sheet could be firmly fastened to thecarbon sheet, adjacent and below the,perforations III of that sheet, andthe marginal end H sheet to which that carbon sheet is firmly fastened.In other words, the carbon sheets and writing sheets should not bearranged. with relation to the perforations In of the carbon sheets, I

so that the perforations III will be located between a writing sheet andthe carbonized surface of the carbon sheet that'is in contact with thatwriting sheet.

A booklet-of alternate sheets of carbon paper and writing paper that hasbeen severed from the book is ready for duplicate writing, except thatthe sheet that is intended to receive the original writing must beplaced on top'of the first sheet of carbon paper in the booklet. Afterthe duplicate writing has been finished, the writing sheets may besevered from the carbon sheets and withdrawn from between themby'pulling to be separated, whereby groups of sheets of any desirednumber may be detached as units while the sheets of each group remainattached to each other in said group.

4. An article of manufacture comprising a plurality of sheets of carbonpaper held together adjacent one edge by a bond having. a resistance toseverance that exceeds the stresses resulting from normal handling ofsaid sheets but a severability that enables any two contiguous sheets tobe separated,-whereby groups of sheets of any desired number may bedetached as units while the sheets of each group remain attached to eachother in said group; said bound end being provided with apertures,whereby the book may be suspended on a holder to facilitate interleavingsheets of carbon paper with sheets of writing paper. 5. An article ofmanufacture comprising a plurality of sheets of carbon paper heldtogether ,adjacent one edge by a bond having a resistance to severancethat exceeds the stresses resulting I from normal handling of saidsheets but a severthem at the corner exposed by the notches 5 in thecarbon sheets, in the manner illustrated in Fig. 18.

From the above description it will be apparent that there is thusprovided means of the character described possessing the particularfeatures of advantage enumerated above as desirable, but which obviouslyis susceptible of modification in form, proportions, detail constructionand arrangement of parts without departing from the principle involvedor Without sacrificing any of its advantages.

While the invention has been described in language more or less specificas to structural features, it is to be understood that the invention isnot limited to the specificfeatures shown, but that the means andconstruction herein disclosed comprise the preferred form of severalmodes of putting the invention into effect, and the invention istherefore claimed in any of its forms or modifications within thelegitimate and valid scope of the appended claims. The term carbonpaper, as used in this application is intended to include all classes oftransfer paper suitable for such purposes.

' I claim:

1. An article of manufacture comprising a plurality of sheets of carbonpaper and securing means that holds said sheets together adjacent 'oneedge, said securing means having a resistance to severance that exceedsthe stresses resulting from normal handling of said sheets but a,'.severability that enables any two contiguous sheets to be separated,whereby groups of'sheets of any desired number may be detached as unitswhile the sheets of each' group remain secured to each other 'in saidgroup.

2. A book of carbon paperscomprising a pluralityi of sheets of carbonpaper held-together adjacentflone edge by means of wax'that is severablebetween any two contiguous sheets, whereby groups'pf-sh'eets of anydesired number may be detachedfas units while thesheets of each groupremain attached to each other in said group.

3. .An article of manufacture comprising a plurality of sheets-of carbonpaper held together adability that enables any two-contiguous sheets tobe separated, whereby groups of sheets'of any desired number may bedetached as units while the sheets of each group remain attached'to eachother in said group; the edges opposite said bound edges being providedwith means to facilitate the separation of said sheets in groups of anydesired number.

6. An article of manufacture comprising a plu-' rality of sheets ofcarbon paper having at least one edge devoid of carbon and a bond thatholds saidsheets together adjacent an edge that is devoid of carbon,said bond having a resistance to severance that exceeds the stressesresulting from normal handling of said sheets but a severability thatenables any two contiguous sheets to be separated, whereby groups ofsheets of any desired number may be detached as uhits while the sheetsof each .group remain attached to each other in said group.

7. An article of manufacture comprising a plurality of sheets of 'carbonpaper, arranged in alignment with each other so as to form a pack inwhich all of the carbonized surfaces face the jacent one edge 'by a bondhaving a resistance to severance that exceeds the stresses resultingfrom normal handling of said sheets but a severability that enables anytwo contiguous sheets same direction, held together adjacent one\edge bya bond having a resistance 'to severance'that. exceeds the stressesresulting from normal handling of said sheets but a severability thatenables any two contiguous sheets to be separated, whereby groups ofsheets of any desired number may be detached as units while the sheetsof each group remain attached to each other in said group.

8. An article of-manufacture comprising'two or more sheets of carbonpaper held together adjacent one-edge by an'adhesive material havingadhesion that exceeds the stresses resulting from normal handling ofsaid sheets but, is severable between any two contiguous sheets bypeeling saidsheets apart.

9. A book of carbon papers .comprising a plurality of sheets of carbonpaper held together adjacent one edge by an adhesive material havingadhesion that exceedsthe stresses resulting from normal handling of saidsheets but a severability that enables any two contiguous sheets to bepeeled or stripped apart, whereby groups of sheets of any desired numbermay be detached as units while the' sheets of each group remain attachedto each other in-said group.

10. An article of "manufacture comprising a plurality of sheets ofcarbon paper and securing means that holds said sheets together adjacentone edge, said securing means having a resistance to severance thatexceeds the stresses resulting from normal handling of said sheets but aseverabilityc that enables any two contiguous sheets to be separated,said securing means comprising the folded edge of one sheet securelyfastened adjacent the folded edge of the next sheet, and being weakenedalong its fold, whereby groups of sheets of any desired number may bedetached as units while the sheets of each group remain secured to eachother in said group.

11. An article of manufacture comprising a plurality of sheets of carbonpaper and securing means that holds said sheets together adjacent oneedge, said securing means havinga resistance to severance that exceedsthe stresses resulting from normal handling of said sheets but aseverability that enables any two contiguous sheets to be separated;each carbon sheet having attached toit, contiguous its carbonizedsurface and adjacent said securing means, a writing sheet; said'writingsheet being held to said carbon sheet by a bond having a resistance toseverance that exceeds the stresses resultingfrom normal handling ofsaid sheets but that is exceeded by the stress resulting when saidwriting sheet is pulled at its free end away from the bond; wherebygroups of sheets of any desired number of carbon sheets and a likenumber of writing sheets attached to them may be detached as a unitwhile the carbon sheets of each group remain attached to each other insaid group, and the writing sheets may be withdrawnjrom between thecarbon sheets by pulling them a their free ends away from said bond.

JOHN B. BEACH.

